University of Groningen
Catalytic hydrotreatment of pyrolysis liquids and fractions
Yin, Wang
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Publication date: 2017
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Yin, W. (2017). Catalytic hydrotreatment of pyrolysis liquids and fractions: Catalyst Development and Process Studies. University of Groningen.
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STELLINGEN
Behorende bij het proefschrift:
Catalytic Hydrotreatment of Pyrolysis Liquids and Fractions:
Catalyst Development and Process Studies
Wang Yin
1. Bio-oils obtained by fast pyrolysis do not resemble typical crude oils, as they are polar in nature and contain considerable amounts of water and are as such better referred to as pyrolysis liquids (Chapter 1 & 2, this thesis)
2. The total amounts of small organics in pyrolysis liquids as reported by Valle et al. by using gas chromatography cannot be as high as 97.1 wt.%.
(B. Valle, A. G. Gayubo, A. Alonso, A. T. Aguayo, J. Bilbao, Applied Catalysis B: Environmental 100 (2010) 318–327).
3. The use of phenolic model components for the catalytic hydrotreatment of pyrolysis liquids in the low temperature regime is not useful as they are not involved in repolymerization reactions. (Chapter 2, this thesis)
4. Ignoring the organics present in the water phase after a catalytic hydrotreatment leads to erroneous conclusions when considering the transformations occurring at the molecular scale.
(T. S. Kim, S. Oh, J. Y. Kim, I. G. Choi, J. W. Choi, Energy 68 (2014) 437-443).
5. Small organics in pyrolysis liquids lead to the formation of undesired gaseous products during a catalytic hydrotreatment and as such it is better to separate them at forehand, e.g. in the fast pyrolysis process using staged condensation.
(C. Lindfors, E. Kuoppala, A. Oasmaa, Y. Solantausta, V. Arpiainen, Energy Fuels 28(2014) 5785−5791).
6. Comparison of the results of studies on the catalytic hydrotreatment of pyrolysis liquids is difficult due a large variation in the properties of the pyrolysis liquids used. 7. Burning biomass residues after harvesting is not only a waste of energy but also a
main contributor to smog in China.
8. The greatness is achieved through diligence and retarded by laziness. The deed is accomplished through thinking and destroyed by idleness.
业精于勤，荒于嬉；行成于思，毁于随。出自《进学解》唐·韩愈
